Read this paragraph below from this post. I think you can not do this by domain name but you can do this by email address.

Ignore Emails (Subject)

Default: none Choose which words in an email's subject will cause the email to be ignored. You can use this setting to block "Auto-Reply" emails (such as the Out-Of-Office emails), so that many tickets are not created. You must specify a valid Regular Expression for this field. For example, to ignore autoreply emails and out of office emails, you might specify something like this: "Out of Office|Autoreply" Note that you can also do more advanced expressions if needed.

Ignore Emails (Body)

Default: none Choose which words in an email's message body will cause the email to be ignored. You can use this setting to block "Auto-Reply" emails (such as the Out-Of-Office emails), so that many tickets are not created. Again, this is a Regular Expression.

Ignore Emails (Full Text)

Default: none Choose which words in an entire email that will cause the email to be ignored. You can use this setting to block "Auto-Reply" emails (such as the Out-Of-Office emails), so that many tickets are not created. Again, this is a regular expression. With Full Text filtering, attachments will also be checked for the expression (including encoded binary attachments). As with all advanced settings, use with care.

CC Email Filter

Default: none Any email addresses entered here will not be added to the CC field of the help desk ticket. The email address will still receive the initial email, but none of the subsequent ticket notifications.